A single-photon emitter is a crucial component in building quantum information technologies, such as linear-optic quantum information processing [1]}, quantum simulation [2]} and quantum communication [3]}. Hexagonal boron nitride (hBN) is a two-dimensional (2D) material with a wide bandgap (\(\sim \) 6 eV) [4]}, [5]}, and can host stable and bright color centers which possess single-photon emission [6]}. Meanwhile, the manipulation of the optoelectronic properties of singe-photon emitters has garnered special interest [7]}, [8]}. These properties imply a great potential of hBN in developing quantum applications. Being able to select and purify single-photon emitters is critical for generating
controllable and narrow line width single-photon emission. Hence, the identification of the atomic origin of the single-photon emitters is crucial to the development of this field.
